Tweeks and amazon are doing it but wasnt sure whether it was good to invest in the 500ml or 120ml? Apparently there is a strange way of applying it...but its not really clear on their website how to do it.

Apply at room temperature, shake well before use as the wax separates from the liquid. I put the bike in the highest (fastest) gear, turn the bike upside down and apply at the jockey wheel whilst spinning the wheel until the excess begins spraying on the floor, then wipe off.

The only downside with R&R, once the novelty wears off from having a totally silent drivetrain you're more prone to noticing any other squeaks